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US5055002A
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Downhole pump with retrievable nozzle assembly
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US5104296A
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Engine end for a downhole hydraulically actuated pump assembly
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US4768589A
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Downhole hydraulic actuated pump
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US4744730A
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Downhole jet pump with multiple nozzles axially aligned with venturi for producing fluid from boreholes
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US4664186A
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Downhold hydraulic actuated pump
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US4544335A
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Piston and valve assembly
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US4477234A
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Double acting engine and pump
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US4403922A
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Seal gland improvements for hydraulically actuated downhole pumps
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US4369022A
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Valve assembly for hydraulically actuated downhole pumps
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US4321015A
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Downhole, hydraulically actuated pump assembly with pressure settable packer nose assembly
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US4293283A
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Jet with variable throat areas using a deflector
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US4268227A
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Downhole, hydraulically-actuated pump and cavity having closed power fluid flow
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US4329916A
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Packer nose assembly
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US4248299A
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Packer nose assembly
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US4214854A
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Hydraulically actuated pump assembly having mechanically actuated valve means
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US4202656A
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Downhole hydraulically actuated pump with jet boost
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US4143841A
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Aircraft breakaway cabin section
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US4088328A
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O-Ring seal assembly for borehole pump assembly
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US4183722A
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Downhole jet pumps
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US4285215A
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Rotary table and kelly guard
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